Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2181c393223233f47f97de25cdf299e7bf77d5c01a1a22e7b6a03009ead0e1cc' 
  AND token = 'A8qYKdSP3mhqcfT0cGGFkj2SivvNlkEd0jhP3Q05c8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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