Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cca4d36dd54914b1d1e8ea1156e4743e25055271dc66c016f071d1fd14b0ced0' 
  AND token = 'XE6O1zGP/pkhhougJSVkaVYaGo6BTjs5jejVGZz1RGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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