Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3166136bdeb048be2fcc28b02edb9a640fcd85e24cda5f3e5807f00274b17069' 
  AND token = '6Y/c62NaWYrERIxITCxzipnxuyKiKUlpHrgujCvJ3Fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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