Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02c29ede579171e661abc974dfd6cf056ea314d367ca99c69134ccd40e8f6d00' 
  AND token = '9LL4ydRsoRcA/zULjBBeMawFPyOk2+8HveYGPDZh1J8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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