Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '45abf0bf068dc7dac4f0b43949d17511593ab32f20de7955c836bf97cb8e464e' 
  AND token = 'P0TLU18gyLfIlOIOdBAaRzKr6hitpTmXEjgwlQeh2to=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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