SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'bee1f1c3b59a233b456b68f90d1d6246b6e8508f54e4be0a77fe84a92fc82551' 
  AND token = 'kuHThmh9/oQkjcypQvod1jJhugDr/jauRNzN1BpbrVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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