Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e23fe95bdf361551c4fa26772a4be17c8c1c4673833dcf198cec3e8820e2bc83' 
  AND token = 'rgtKRE7Qxg4df3JtZv8tQd/ZXLWiAUV7SFoTwOVO09k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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