Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13e77445ce0115aca7db16051ef4c31d8cc71b0dd306832d35a54256da411f69' 
  AND token = '7NG03K5cbexYaXZxLCuW3rLPjboS8xPuLHo8N7UNxsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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