Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99867435f2d2a9c25d756e457ec68120f5f96b7782f8f9e537c802faa267d662' 
  AND token = '8Va/KFQIIuS0nUonpZP31/3BJxcYKRedWDW/rm5OMTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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