Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '071aa94680e079f88744c64481219e54370fb9c5a7e1cfb5096fc5fd4209bba3' 
  AND token = 'qICm+2+Iiu/5bwvl82SQ5lAnHU+2b472dAQllITrNWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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