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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbf0a19db0058257f282c19705d0d8fe7f2db13573416012785132ec2dbe84cc' 
  AND token = 'QQXbS0Kpxyh1c/MaUKeL81zay6TgsAybtDqURLNjltU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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