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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'cab293a724c1750c0d7a89523e30acae2a323031aea8ec1e56e4f85c314dd451' 
  AND token = 'rwx3rfLf6wlrSN46rnEgW7H3LORE+v6km6sutDbaMsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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