Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a64ccd297bbba41fd2b4d2729d4e34159447ee4ec670a49418ca88ef22dc7aa' 
  AND token = '0cvRDX0mwy+u9hYzu5WV/FNUinFMkp+dvqRCxeCwOvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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