Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0548b0d41508e4a87d4bf110a2a47c0e7c45c4875c6ae9a1b56d2514845e9b0f' 
  AND token = 'a57CnseiP54aeVItCo+AZZ2V32RIb9wXIGWuUG4FwF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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