Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd69d9fa3c1fe31aa828d131825c3f04fb3c1c656602bfc77b3d38709b0b1aa6a' 
  AND token = 'HFMljSikGeWfMa96s/Li1R1M0HdnT8q0M0boKdDWB5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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