Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b8f28a85047ed778911c6fe5be22f961388e492a069f4e68f8047bf23f22979' 
  AND token = 'KaEMyCaImu39lPMRxwnM5LS8TnEpzPvcj5/JA4g/gmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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