SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130154fb3ba88d8dce18da7d8f6055ca264fc6a662a597b37775981b6217624c' 
  AND token = 'vWEj1bSxVVKZbkVx3Jh26SwSfjgDpVaxXz2SsihSEBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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