Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0134c8176b45618523999fc3590dc735fc70ed6d21d22c1c3192a05bc2f1f967' 
  AND token = 'OvLX9hvEmjlzz8LEeqR2h8u4BLvxOshyIi4xWs5uzN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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