Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dbd6b0573c5752b9ba0d9909c3a79a5eecb3f222acd7f21bb554a6c1e01614b' 
  AND token = 'ZAHCGPGco3KLZMj3cZEhvpBpsdKVx7mUUMSNVYWsVRc=' 
  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"
    }
  }
}