Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'cfc1f47a0311c6898db4ceeee7469794776de8853a3cab27da6d2c4785d01c0d' 
  AND token = 'SnxOvvHYp5Vg1XSY9na6mxOXwC4mJtPYIDLrXl87onA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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