Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a339d6cc9f7eb630a71aa7551824616b614f13e299abca310fe2a8f12f2dc2b' 
  AND token = 'Y++/Pfct8Isw3UlSu/6gUVZi1CkecwYXmFufaabS8w8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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