Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '661a1bcc97a5e2fbd85d3ee09a47c8ff2ce918ba574d5afa5a8d72a0ba761b16' 
  AND token = 'bYUcGIkNYhOH+L8vrYONVp5Y/fnz80YsA9smFadIssM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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