Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3eba0dd0ab32858c1ec7219d461db5588b18144b7e5aaea4a59ff6105ff04dce' 
  AND token = '2/9RlqcW2/Prllf0jQr986HfpQco1KoxJGW4TtU84EA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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