Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c963f20ee35e76e79a760d237398c707a5a7e0cb777b44b5d69cc368ce5f4e85' 
  AND token = '7p/DNam+n2rDjyu6vR/Qvhaq1TwpW0QdTFz4O8StpOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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