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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'd5b74801b6c953530dfe5b96e4f3715b839e0577df614ccb137ed701305717cd' 
  AND token = 'Cz/bRu4cFdOnM55nasCkcdzKGGTX4BXcK4EM++7xSsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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