Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '65f772c0b37c05f8a9c250e43691ce300647ddc20aa3d5d151f9b2b0ac8afdb1' 
  AND token = 'sf925++CJCPjfYDiTc8cy+YgSwcKr7MNbQXkn1eecbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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