Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77eaceff1eb6e0f4805f62ef63b38c264c2ea601476c151cecb0c34cc0d2d53a' 
  AND token = 'ovAzhuS8Ar7qODBmajDQbevRlR2oVXBLSDVznu0q06E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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