Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f241429e8dcf7ca827961dabd5e04800b370cf652556c2f363437cced562d1e2' 
  AND token = 'Yvf0S/Uq0YI0Zc5t2vpiTMx1RQwyv8wtAqWYJI2riW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}