Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aea629091ec78899f79e20b027da3cdaba5e9e307a96fdd10f501603b799bf5' 
  AND token = '3eWDNEAikVXYB+5qkxKXwWj6ZfaBeA7+5vMxSJmwZc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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