Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1ca2ecddabe9b205a3dfde56d173b2846482a090511af565039767b23005c82' 
  AND token = 'uykWkykaGnbpOGOgMErRHrrGqegRyUWbgeOsH5F3e6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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