Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5ffc869f6150cae708dc9949f33a6f3f498f2455fcf8f5eb61510fd9684e361' 
  AND token = 'D1eMxmkaNNHzSHCIMECPXgb1c1KnEdz6OHc57fQ3buY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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