Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34cd46e2466bf856907a3f25d564ffb1e8ea8cc47346e32105a5b8fd6fba3f4d' 
  AND token = '26ihtTmkhCzozbEm+kKKSRei6f68mnaJhlY0enp4A8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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