Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53b06ed211ef945113dcd64f610bdca12b40011d4056f16bd7efc08387f74fc2' 
  AND token = 'wWikE6YukmhPSvpwfGcmoZgZtWjezBJxYZymls0alME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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