Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb6123dad8d8bc92503bc11696b057274ff95b58c00cc1a9ad3540783e5d1995' 
  AND token = 'O1Q0bjI2UWg1u6q9dOgA4f7/5dSSb8ViHjZCxhOySp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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