Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd6f94b44465f972719850fdd85cfb80590924701a23fa96123bfc33a69755ff' 
  AND token = 'M6D+FBA9MImQbso7/kFWPmd/2bWNtHOvDC/5eA6tmDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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