Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b90aeca84b73faebc6ce1f288f1cd1b58140398d3e587b309a69e61096106a8' 
  AND token = 'C1WBagjhAGqN0/zjGZ7V1Pp3QfnFCeFNgXA9bqHWRCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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