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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1532675e7684efdcd7db1e0b19f804e312c6dce177e04bea641d9d9462dd2502' 
  AND token = 'Mv9uBzlypKhXN0U1I0FCwcKxuk2o3uDdTDTgMHwmr0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}