Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13c98fa8c78f2784280148f6f37f983ba6176558820b5fdcf47a30b3518745e1' 
  AND token = 'MCHmFttQLDZPXuAbQSSiuv4DOkKCEYpOe9toEtp2yYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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