Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64ea3e23f6d1d2a2377bc40b4086f91c3057e822647fb39d331f9d3414ff1456' 
  AND token = '6pk+zPZABsXC7Rx2j3bnnLf6uVOAP/tnmlbL75x5tqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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