Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e381909745523a131e6c55d3e61862556131ad49f35c5feb31a85125de34bb86' 
  AND token = 'ljOho1NB55UDZvBgGL2n+Qemh09XhJmfq4h7cGDqhDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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