Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8ca4f6d506cd1c074ba6d748701cbabada1a91c86b155df15dce3c6c863319a' 
  AND token = 'KbzXLd8vrP+eOLNpsK5Ujtir/dBOOXk64worC/UtZgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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