Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2919de11a5c3c5618816682d07b5e86c63775da1b248c70de426d93c96e875ad' 
  AND token = '2byiWdnxLtZzpkhBZMHtyll4Ywh5TM46ncvU7CNRp9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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