Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0284964b40ec9dfdc66dc963fe8ee1333cc3a94dadcd5d75bd8fc568191c0b0a' 
  AND token = 'iR1ALU4BFquNZaDDjgoSvpK96HdIAPPO9LyYaY1GD70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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