Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0427b85eb52a47b7d8eb7947c9f2449462e24b653bfe5ecd25118ba349717c5' 
  AND token = 'oZPEnABr9OnHmdo44BGB/fJmDUEdKtSO3Qghpl3V2ak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}