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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2cb40b453c689d039a67ceab67363db713f167114161efe73413b75c9001ee8e' 
  AND token = 'FIl1VXIbO/us5CM3M9SJf2qy0igpnYsbjtcymZlrmIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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