Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b6dcd14482c7ca47acf6e93e8e1a5b773d893998dee339e4db8c231e603ffe3' 
  AND token = 'CulJwk6VtGzPOR2DHKM+Fbw5j+EwrDJR5Ga879mHTw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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