Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f5c8ae02b77f3bc5b0ca263a0b65e7533b9b96254088271f9e2167ed531730f' 
  AND token = '2sop0Sk6AAZQZiX0k5NC0CqHUig9QQsg0ZmiWljmh94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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