Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41ffd3a5ada0418a26913870687674e87bdb18b46684caa233abfae778b77162' 
  AND token = 'nrv2+VnChsPPy6UQc6NBzedvWRSTXXg61SLYiOasZH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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