Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4b76c7232b8bc609e5e7348717989a9a6484688ba9baa95aa47463b02ec59f2' 
  AND token = 'fSb3z4bKXauEPr24MFgFS5KEZDv9kdc4lOWXytnNrIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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