Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd951f4ccad69d336666bbb0c97dfbf91014e0451571cf756519501c3d7580dda' 
  AND token = 'V+qlgrc+AQvK1M/xKB7Td/MQxAsOsX7N4Gs2OenfOT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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