Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f03e0acb26c63bfd795870d89443492366136316c12bc21a2c2df51bbda021c8' 
  AND token = 'QoKxvE4SwAQl+kH7CwHSRicj0oFoQ1Qiirx1n9K24H0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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