Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d4d3dec8feaf00cf26ec625dcc9fe68274247033ec0b9dfbae112b816739dcb' 
  AND token = 'R/JtYOyaThzChi8MlIk3B1Su89W/KvMA94PPP4FDCxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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