Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1455f073e2dc6a7fe1d0c1ce5d2f8c8169d62349ff765bf6ed4796405329b8c3' 
  AND token = 'Z0KcklukcN6dl1RdSx40+UlEDk3Cy5gENpnLlxVcOM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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