Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2040836a13e315004586c6d4322d0d0b4465b0544a751cc0dcac896f6e91d6c' 
  AND token = 'frMItrN6krOsaunzZUjHeGuTa0/kaN71thp27XxMfR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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