Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56ed686647c11b1ee272c17180ba95d3dfa7401547c0ff27370d1595fca77d63' 
  AND token = 'NPuZIiJJaWXr7+feDcqYEPfDyTLvESw8zLYvozufq5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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