Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b11328adf09f01c91bb55faf9ab9b3fb49343656926b8158621d86712b0e5ec9' 
  AND token = '/F/O6vVC3uUd0B7xj3UX2351y6/KXAMjno+OlI0iBjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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