Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09470019afce146be2d0b760dfec74df3379db63c751517a301971edc8fbcabd' 
  AND token = '3ousykNQ+x/MBRHQtGtzVn1TiHcYpcO1ndAEZ4Wzgeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00164

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}