Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c70320e039f514dc14d067d69509b2639aa8099751222db0954f80549c499d84' 
  AND token = 'OB0F5HjkKc0ui7iB+Qvs9ZbXKNDIHcj0RbHtHohoUuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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