Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3787c5d290633f0ab4e893c226093bfd3514d4b774a9287050003747e3436e8' 
  AND token = 'efc0GLJlWKKUVqfri36MKDvg1olhC4ngaEJsRGwqL1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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