Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd344b858e1608ece7abb02d3100338c6ecdac3c79a3496533622e6af7aeebc5' 
  AND token = 'THj4o4tO5rxzlGemmJyK8b3RAhc+aMmBjv86f7DiV+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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