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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b80184c70abf097037ac86fc5cbe315348dd3a0c3b106d6a21b46daf4c73ab1' 
  AND token = 'tq23Ih81DAQeP/sidugHAlwD8Z9Yb22xkBubi08fF54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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