Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5b3383e66144d32e845311afd551b2bccaf73a9535c5ba2be5af469f493d6f5' 
  AND token = 'VKqd9n+1V3Jlkqz6JghpPX0r31g+J+Df1bZGfsp+fX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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