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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '0cc35e667866c5c7d003ecfd4e7f9d7dda56ab271ac366a341af78c93b5a212f' 
  AND token = 'UW5GxEwOF6Fphw+zdbP1z0VA9H7+RrvWniedgjvwvm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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