Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '307b1175a59e950ed4ff8f15d744349bdaa96d05c74903251151d1f574e619d6' 
  AND token = 'vfmSERicFNu2lgJfZuHbupfsalZeuUmrsAuH0JQAjX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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