Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1619883f1bd1fcf25cc83aaf8e5f56519661a31a9ed25b25acdbf3a3eead396' 
  AND token = 'KsoQfJIQUP3zfPS5M9FAEWtYJUod0fq7Z8R23UzREiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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