Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '068ce93345e5d9b329f7934e6ccd12ab03b1e9c7a98ee5c5419b08fcdf15ae85' 
  AND token = 'Ie7lADzBzo1Vo8azkQ/0dOzwtHCkm5vuwQtvBCHjUHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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