Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1de3495abffdca796166f31c3446528008151b2856fd86ba4f1bd2b39ca5d44b' 
  AND token = 'D69XUJIHIsf80naneVd7O0w6vyKd8+baT1DrRM3B0rA=' 
  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"
    }
  }
}