SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '68e087e09fd3de04117a7cdcce8bdc0cddd5ade1f480de35a785513903635d1d' 
  AND token = 'EUAmLJJfGwMbI4BVPGX2xhOADn6+v+o9Ki8m31tWqMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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