Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a29e80eedfbe0bd0f6e3596124303d46eb6c768066910bbfc681f99c3f38225e' 
  AND token = 'xRHJJU+aKbUzw2ZZOJZQpHJopvwjen63DmGjByOt1Xk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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