SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aee4d28a822f7dc2784bfb5ee70fee512f7f41a4869952e1749d4c4818379c74' 
  AND token = 'pIhpJJZibJ4jXFwpg/r+w95fVMvAXAgEnqq1rBJw8nM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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