Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '286a1a1cded9d968c4dfbcac665ccdfd14521b0cf6468d501956acb0f2316699' 
  AND token = 'ShNLGkRNNlmMCxKffkWv+/JCrhXUaUsh2ULkqLWvVYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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