Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72ac442920f14eb1dae383922cb53c21c3bdbf146e12c3e0ebf7e0cb0a1e4f0c' 
  AND token = 'qaKreLhwIkMrpZIlNBs0OQiEXWg4tejWwOUC9JnsES0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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