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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5453ce8aa4d7d3e5d566ef93a18644eb73ebe85244a34c4713802a2d5ea61233' 
  AND token = 'je82ogrH954B51I7SJOm9plLS6e1vkS60FH/LmOBjjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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