Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e677c981cb137db7ff9d39fdd772e3c054df830ae8eb7968878ea319236ec76e' 
  AND token = 'CTRZBi0qXDO4Pu2MFZMNe+al+Op1BJ19IThWQvft7Eo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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