Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7d0c08b10f064ac7c5b26c6c683af3c0647359d85e7187422e9213d7d19ccb9' 
  AND token = 'cpfE0KYy4WSBW1/oQsUep4kN7Os1EDKigA5InAvVhXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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