Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6efdee4ba2794a7b0ebe5e1170c3ef07fe87a877a9f345f551db941c7bce19c2' 
  AND token = 'u1+KcGAJVO+dmHOF7OMQRC5B930VwhTUlwui3FiC4IA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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