Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc77c253d8763ed3f554ea90bbe59cde71ce5b38f15537c8da0e49b882df9341' 
  AND token = 'RYhheBxEtiMR/7M9wQYB8OVf6da0L+G80lxs+5uW46Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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