Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '316a52a79bb92a9221d28b2913cc563524590ed369dbaa702e6666c0d87913d7' 
  AND token = 'BwN1mZDZ2f2P6jaPuzNEHchp+WZbUN2dpCWt0EUecp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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