Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1d227af82a1aa831d25a0c0374720d6ee5776596f3c6a9357a12b47e7d2cc22' 
  AND token = '9fIdl9qtRYiN5PtI/HbrMA14MunBk6MmSlLXjXP7TrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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