Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9979fc16dcbc5554d6a672436d12ecc1adcbb1118d5c9779e839ace13d03196' 
  AND token = 'owcrqMGrv1B5vhNh2ZIbe26g1wyOijTQeYDvLRdgrB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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