SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02defa37181df2977f1286cb762d357ba53ec5ef31b2f41e48fdb1cb7deaa416' 
  AND token = 'CZR3wDoHVrgWnZaJ6YXhzZrVs4gRegW3Vy9XjGyoJdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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