Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5708b2304633909996102ae788ded9adc95666c40c4365144eb65822f266272a' 
  AND token = 'fyL0pHtKQJpnk9as3go38D2+h0ZOBh/3YG3fvjiEHRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}