Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab6ac8f13e1523b83afab0b1c5399b1b240405260d94cfca0022cb9b915af1e9' 
  AND token = 'cbDvN5wiXZsZpN0YdnUol0+FIo8BW6O5o2JgFGfeUs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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