Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3858ba7fb791707bb93517e525323c9e9b1e4f2004b13b9032885c51b107c207' 
  AND token = 'JATCGiKjHBvcQ65089Flh3rxRBVC/kLdmHTpKNji72c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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