Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d02c64b07b384b11cefe077bb11fa8d4e1b4ab836f1f3cb0a3855a37dc34fdd' 
  AND token = 'nFmeb7SwzdeMr5Mds8lB0pAoGXnNdu4YF8uo+bAStOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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