Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '260c9cf351a1c4c5dee938d69b7e51259044521ed0b5f37a7aa70eb551187845' 
  AND token = '1DrjRARhRvv2ztZzi9S96KJHLcq0sl5/WSclyuS2R1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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