Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fba2185f68aac51c5dd8950bd2e1907a611b4b00e225d124faf0a3f97d6f81e' 
  AND token = 'BZNw7dDwbW3oUEfXalZiz9iDutW2e6K78IAQDmDlOR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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