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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '9df09af54e35df2d7b93ebc973a9b5112dffc8b8c6d5885518122e33b6d98ab9' 
  AND token = 'Ze96ejmA0pLzLQ5fjYnKEondK+HxaLz74Ygd1eDb2g4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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