Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd390d55bb9d077f603b7016ca02e913b4267c03d413f25ba3bd9f3ca66c2417' 
  AND token = 'yS+7wivO+s9fUvRIsMiBpimNn+qV/18XOc3qQjt8vbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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