Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36d86cc21f6fd7d28faf90e3f95fb10bf6e4baa3a3044b06f28623a0e6c1216a' 
  AND token = 'pv+YM3oK1opP7eKOkrWQv1Azgf3D4Lzy9OgunzDV1kw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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