Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa45f847c1289fe17813c7679f7cfbcc81b357afddca118802e4ade2ede4c2bc' 
  AND token = 'Vm3aDH9RWrdFY8RkA0JG9aZzZw8KE+94gtm6O5L6cpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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