SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d28af9dc143fb56d953e5b07acde300325ffb50a4b585e6b9fbc8477839aa43' 
  AND token = 'W/l9VqIiHYvkPLWDqnS1cSj98T7m9xnQ2qvENSZ+sCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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