Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19a651b87aebb0c07daf8302ac44dab0415532c0a8a2a879d23552a93cfbc42b' 
  AND token = 'qWqA1pNKeiJhjvOQWpj87QyzU8MuApK+JnjDmQB1sso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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