SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1cf6899bf803b2ddb9e672609c1e106b3120fee7f20b241f392f979e842b409' 
  AND token = '8mafOKBPe5JzYsgIlyFa+GGtNrQItZZhX5CFZN877hA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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