Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0708322fdd8a936d89c1459c423e2e637268dacc0823684f66932af89db6f77' 
  AND token = 'jqo0La/GyTO2AGT/XSnHJ6tMTPR1cHOhedwuoktNdZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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