Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35b93a0c299202110d7e9156da5fefc80bcc7e575c101724767405c01ddd167f' 
  AND token = 't9wO5jhyp59rKo5vt1dvRH8M8B4hWNIP/gn39EncP1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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