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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '625dc2b9775a2ec1db76cd972d56f862b4a24f7dc15d2570bffe8ab0520a7fc9' 
  AND token = '957ezmoro8GpuKsduiR4J1Ur4C4eABOts1ncV09uDcE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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