Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f764b6f679af7ba4e52783a4961a589181d1f52d6da9776640c8f0acf7d4adf7' 
  AND token = '5khODTom6nHWS6h2YkEXnvyDTPV7z02FOh3npNo7zu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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