Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '974e2edadb9bcde19c247a816d71a503e7a8b4877dc5e184aa8af79535a1e39a' 
  AND token = 'L7Pcv4INy5F0hEf4R9M74YEk81mXRaPEfEtgsPO/Lgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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