SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cef4d1519e0d64a9f6751c60f1213e88d7db8b37c9865347f4360828f63fd44' 
  AND token = 'gQZ/3lggtqR0MD7REKiWF7JkdaW9NJPfDkvzunTuwFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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