Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62ad6887d52a24ba8dd463399eff60baa1298edaa0a4893ff67f38500cac6c91' 
  AND token = 'JSs11XWD7MSA4zsXoRle7EHG71vuuSVG/gQ0NAALoKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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