Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac6219bbce2cfa7488558a0ae22f57a08112f885d5ae165e89138bd50a15a8ee' 
  AND token = 'k1JLgf8CpxtzXflMdM7wHQPmzkLPS8YD9wGnKEWIQ0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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