Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '116d4d409c1dc9959c0c0b1d739246785767c4c87c86c5e13209d078c4c0deac' 
  AND token = '+BC7qjqN4Yc7aXiFF3LQ4ZOxXn74ozlIDGIXBiLdi3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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