Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77a7ea5abddda0030fac1408205d15ac1384eb2f06e019a3eff8a1ffb810a29a' 
  AND token = 'NqpXsO2GlUv/R9Gpbk+xdMMKmftNcrfGd49WHuE2u/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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