Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48850f1d8796bacc7e688847718a9e001ce351e822a3ae15727feccad90b8261' 
  AND token = 'cZWMgTJYDVinMX/T13PnMey9ClzGHqJfxbg3yCwbVCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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