Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27e5bb8d3de65a7fae1b69694087f8155c59017d2c14b6b9715b23dd43d150ef' 
  AND token = '++n0BizAa2DdpewMBmDZ+mtGsq5tYCHc3W4A7SND5tc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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