SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '721bf6283a876362b73379fb24c7d1cac79d91cadc103a9fb34d671a7d849ef5' 
  AND token = 'YA7sqGw5dEbSnCy1LhP8FSrUpA5C+n150MNtQZ4vgqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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