Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d9e11164fb63c5ed7972e1252d3dce764908cf51e381fcb8bdf3709f26e49ca' 
  AND token = 'iAm6e65/bCyp9Eua2K4+yNlwICM/otI7FAE+RFwrNDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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