Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f8ecc7aff123d6497348dd0d61cd7312c66a11b7967e5c70449ffec3cbf6748' 
  AND token = 'g3+YeZHCxDejrvmhDiA//3Q3j4ynUBhb07xWaBi6Kfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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