Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '861a11a38b4805ab96c9cdb997d53e4bfb7b9e6df6cace56ca5b4f74ed764087' 
  AND token = 'uCxcuzj55GMgOhEQqCQhrcdLoow79kKmuHXyyPkxLW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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